Murrieta, Riverside County

ADU / Guest House Cost in Murrieta, CA

Murrieta remodeling costs are 10% belowthe California state average. Here's what a typical adu / guest house costs in Murrieta in 2026, based on a 500 sqf project.

Budget
$112,500
$225/sqf
Mid-Range
$180,000
$360/sqf
High-End
$270,000
$540/sqf

Cost breakdown

Foundation & Framing
25%$45,000
Mechanical (HVAC, Plumbing, Electrical)
20%$36,000
Interior Finishes
20%$36,000
Exterior & Roofing
15%$27,000
Kitchen & Bath Fixtures
10%$18,000
Permits, Plans & Engineering
10%$18,000

Breakdown based on mid-range estimate of $180,000

Typical Timeline
4-8 months
Permits Required

Building, electrical, plumbing, mechanical. May require plan check.

Remodeling in Murrieta

Southwest Riverside County suburb. Newer homes (2000s-2010s) need cosmetic updates. Very affordable remodeling costs with growing contractor base.

California allows ADUs on most residential lots since 2020. An ADU adds living space and rental income. Cities must approve or deny within 60 days of a complete application.

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Other projects in Murrieta

Kitchen Remodel
$27,000 – $81,000
Bathroom Remodel
$13,500 – $43,200
Room Addition
$54,000 – $148,500
Roof Replacement
$11,250 – $33,750
Exterior Paint
$4,500 – $15,750
Whole House Remodel
$243,000 – $810,000

ADU / Guest House cost in other California cities

San Francisco
$168,750 – $405,000 | San Francisco County
Anaheim
$131,250 – $315,000 | Orange County
Daly City
$150,000 – $360,000 | San Mateo County
Morgan Hill
$137,500 – $330,000 | Santa Clara County
Manhattan Beach
$156,250 – $375,000 | Los Angeles County
Foster City
$156,250 – $375,000 | San Mateo County
Cupertino
$162,500 – $390,000 | Santa Clara County
Lake Forest
$131,250 – $315,000 | Orange County

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